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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0,user-scalable=no">
    <title>Document</title>
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<body>
    <div class="container">
        <div class="row">
            <div class="col-sm-6 col-md-3">
                <div class="thumbnail">
                    <img src="../static/img/coffee.jpg" alt="通用的占位符缩略图">
                </div>
                <div class="caption">
                    <h4>缩略图标签</h4>
                    <p>一些示例文本。一些示例文本。</p>
                    <p>
                        <!-- <a href="#" class="btn btn-primary" role="button" onclick="alert('hehe')"> -->
                        <!-- <a href="www.baidu.com" class="btn btn-primary" role="button"> -->
                        <a href="#" class="btn btn-primary" role="button">
                            按钮 </a>
                        <a href="#" class="btn btn-danger" role="button">
                            按钮 </a>
                    </p>
                </div>
            </div>
            <div class="col-sm-6 col-md-3">
                <div class="thumbnail">
                    <img src="../static/img/coffee.jpg" alt="通用的占位符缩略图">
                </div>
                <div class="caption">
                    <h3>缩略图标签</h3>
                    <p>一些示例文本。一些示例文本。</p>
                    <p>
                        <a href="#" class="btn btn-primary" role="button">
                            按钮 </a>
                        <a href="#" class="btn btn-default" role="button">
                            按钮 </a>
                    </p>
                </div>
            </div>
            <div class="col-sm-6 col-md-3">
                <div class="thumbnail">
                    <img src="../static/img/coffee.jpg" alt="通用的占位符缩略图">
                </div>
                <div class="caption">
                    <h3>缩略图标签</h3>
                    <p>一些示例文本。一些示例文本。</p>
                    <p>
                        <a href="#" class="btn btn-primary" role="button">
                            按钮 </a>
                        <a href="#" class="btn btn-default" role="button">
                            按钮 </a>
                    </p>
                </div>
            </div>
            <div class="col-sm-6 col-md-3">
                <div class="thumbnail">
                    <img src="../static/img/coffee.jpg" alt="通用的占位符缩略图">
                </div>
                <div class="caption">
                    <h3>缩略图标签</h3>
                    <p>一些示例文本。一些示例文本。</p>
                    <p>
                        <a href="#" class="btn btn-primary" role="button">
                            按钮 </a>
                        <a href="#" class="btn btn-default" role="button">
                            按钮 </a>
                    </p>
                </div>
            </div>
        </div>
   <div>
</body>

</html>